Vent sill rail extrusion



FIG. 1 is a fragmentary top perspective view of the vent sill rail extrusion showing my new design;

FIG. 2 is a left elevational view thereof broken away to indicate indeterminate length;

FIG. 3 is a right elevational view thereof broken away to indicate indeterminate length; and

FIG. 4 is a front elevational view to a reduced scale in which the rear elevational view is a mirror image of the front view. 

The ornamental design for a vent sill rail extrusion, as shown and described. 